Originally Posted by
Man-Thing
The way I view it, we've had two major reboots.
You had the original Marvel 2099 run with its unsatisfying ending after the mass exodus of writers, and then some later stuff that took place earlier in that timeline like the Captain Marvel story with Maestro.
Then the Timestorm 2009-2099 thing happened, in which Lyla attempted to... idk, rewrite the future or something, resulting in a "new" 2099 that was mostly the same as the old one, but had some key differences. In effect, it's essentially Marvel 2099 up to just before the walkout, and ignoring any parts of continuity that future authors don't like, but also having the option to draw in stuff from Timestorm or other unrelated 2099 takes like the Marvel Knights stuff. In this case, the future authors are Slott and PAD. This is the version of 2099 is the one that Shattered Dimensions and Edge of Time take place in, allowing PAD to pick up some plot threads he'd intended to do back in the original Spider 2099 run but didn't get the chance to. After that, we get Miguel jumping back into the middle of Superior and getting stuck in the present and having his whole "crap the future keeps getting accidentally mucked up" thing before getting it more or less back to "normal" by the end of SM2099 v3. It's this finalized state of the future that LEGO Marvel Super Heroes 2 draws from for its Nuevo York & 2099 characters representation.
Then comes Spencer's Amazing Spider-Man 2099 storyline, which involves Miggy jumping back in time to prevent a catastrophe in the future, and staying in the past this time. He lives into this new timeline's 2099 as an old man, meets his younger alt-self, and plays a role in kickstarting the new age of heroes in this new 2099, because his continued presence in the past has had a knock-on effect that has changed things in subtle but important ways.. And it is in this new new version of 2099 that I guess Exodus takes place, drawing from the original Marvel 2099, Marvel Knights, Timestorm, the Slott and Spencer eras, and two scoops full of new stuff as well. Everything, basically.
Like I said above, it'll be interesting to see how this is continued, what'll be acknowledged, what won't, who will return, what new characters show up, etc. I imagine at the end of the day the version of 2099 we see in Across the Spider-Verse will have a grander lasting effect on things than these last two minis have do/will do.